A fly with arachnid boots!

I was pleased to get this tw**t from Matthew showing a fly with boots. It looks like a housefly, and the pseudoscorpions are simply exhibiting phoresis: they’re hitching a ride to somewhere on the fly’s leg. The “pseudoscorpion” page on Wikipedia notes that “pseudoscorpions often carry out phoresy, a form of commensalism in which one organism uses another for the purpose of transport.”